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What do you do when you feel unhappy？ Do you listen to music？ Do you talk to a friend？
当你感到不开心的时候你都做什么呢？是听音乐，还是和朋友聊天倾诉呢？
Maybe next time you feel sad， you should try going outside if it is sunny. Scientists know that sunlight we get can change how we feel.
也许下次当你感到悲伤的时候，如果外面是晴天，你应当出去晒晒太阳。科学家们知道阳光可以改变我们的感受。
Scientists learned this by interviewing people who live in different parts of the world. In the far north， in Alaska or Finland， for example， the days are very short in the winter. People living in these places say that they often feel unhappy in the winter. In the south where there are more daylight hours， fewer people say they are unhappy in the winter.
科学家们通过采访居住在世界不同地方的人们得出了这个结论。在遥远的北方，比如，阿拉斯加或者芬兰，那里的冬天很短。生活在这些地方的人们说，他们在冬天经常感到不快乐。在南方，那里有更多的日照时间，在冬天，那里很少有人说自己不快乐。
The reason is the amount1 of sunlight these people get each day. Sunlight changes the chemicals2 in our bodies， and these chemicals can change the way we feel. A couple of hours of strong sunlight or light from a special lamp can help your body make the chemicals that make us feel happy.
原因是这里的人每天享受到一定程度的日照。阳光改变我们体内的化学物质，这些化学物质可以改变我们的感觉。几个小时强烈的阳光，或者从一个特殊的灯发出的光，可以帮助你的身体产生使我们感到快乐的化学物质。
Another way to feel happier is to get some exercise. Just like sunlight， regular exercise helps our bodies make certain chemicals， which make us feel happier.
另外一个让我们感到快乐的方法是做运动。就像阳光一样，规律的运动也能帮助我们的身体产生特定的化学物质，这些都可以让我们感到更加快乐。
In addition， exercise helps people sleep better and lack of sleep often makes people feel unhappy.
此外，运动也能帮助人们有更好的睡眠。缺乏睡眠也经常让人们感到不快乐。
Exercise also helps us get rid of stress. When we are angry or upset about something， exercise is a good way to get those bad feelings out of us.
锻炼也可以帮助我们远离压力。当我们因为某事情感到生气或者难受的时候，锻炼是我们远离那些不好的感觉的一种好方法！
当你感到不开心的时候你都做什么呢？是听音乐，还是和朋友聊天倾诉呢？
Maybe next time you feel sad， you should try going outside if it is sunny. Scientists know that sunlight we get can change how we feel.
也许下次当你感到悲伤的时候，如果外面是晴天，你应当出去晒晒太阳。科学家们知道阳光可以改变我们的感受。
Scientists learned this by interviewing people who live in different parts of the world. In the far north， in Alaska or Finland， for example， the days are very short in the winter. People living in these places say that they often feel unhappy in the winter. In the south where there are more daylight hours， fewer people say they are unhappy in the winter.
科学家们通过采访居住在世界不同地方的人们得出了这个结论。在遥远的北方，比如，阿拉斯加或者芬兰，那里的冬天很短。生活在这些地方的人们说，他们在冬天经常感到不快乐。在南方，那里有更多的日照时间，在冬天，那里很少有人说自己不快乐。
The reason is the amount1 of sunlight these people get each day. Sunlight changes the chemicals2 in our bodies， and these chemicals can change the way we feel. A couple of hours of strong sunlight or light from a special lamp can help your body make the chemicals that make us feel happy.
原因是这里的人每天享受到一定程度的日照。阳光改变我们体内的化学物质，这些化学物质可以改变我们的感觉。几个小时强烈的阳光，或者从一个特殊的灯发出的光，可以帮助你的身体产生使我们感到快乐的化学物质。
Another way to feel happier is to get some exercise. Just like sunlight， regular exercise helps our bodies make certain chemicals， which make us feel happier.
另外一个让我们感到快乐的方法是做运动。就像阳光一样，规律的运动也能帮助我们的身体产生特定的化学物质，这些都可以让我们感到更加快乐。
In addition， exercise helps people sleep better and lack of sleep often makes people feel unhappy.
此外，运动也能帮助人们有更好的睡眠。缺乏睡眠也经常让人们感到不快乐。
Exercise also helps us get rid of stress. When we are angry or upset about something， exercise is a good way to get those bad feelings out of us.
锻炼也可以帮助我们远离压力。当我们因为某事情感到生气或者难受的时候，锻炼是我们远离那些不好的感觉的一种好方法！